My engine has been running with this for the past month or two now. After I moved to Michigan (and therefore away from my AMSOil dealer who would get me the AMSOil for less than the Castrol was selling for on Amazon at the time), I had been buying whichever had the lower price between the 5 quart jug of Castrol Edge SLX C3 and the 6 quart case of Penzoil Platinum Euro L. (Both had been ranging up and down between $40 and $60 on any given day. Now, it looks like the Penzoil will be the consistent choice for me, since I can get the 5 qt. jug locally at Walmart for almost half the cost I had been getting the 6 quart case at Amazon.
